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- W2356334518 abstract "In view of its high speed and high sensitivity,the fault location and faulty phase determination based on transient quantities can meet the requirement of developing ultra-high speed protection.Transient travelling wave signals,which are caused by faults occurred in transmission lines,contain abundant fault information in both time-and frequency-domain.Firstly,utilizing the multi-resolution analysis of wavelet the three-phase transient current travelling waves are decomposed and afterwards reconstructed to different frequency bands;than in a time-frequency window the time-frequency characteristic vectors are defined to fully reflect the time-frequency characteristics of the signal,and the time-frequency characteristics of the signal and their variation law are described by correlation coefficients,on this basis a method for fault detection and faulty phase determination of transmission lines based on time-frequency characteristics of transient travelling waves is proposed.Both reliability and adaptability of the proposed method are verified by the results of simulation experiments based on PSCAD/EMTDC.Simulation results show that the time-frequency characteristics based fault detection and faulty phase determination of transmission lines can provide accurate fault detection and faulty phase determination results which are not affected by fault distance,the moment when the fault occurred and transition resistance,besides the required data window is short.The proposed method is available for reference to the implementation of ultra-high speed protection." @default.
- W2356334518 created "2016-06-24" @default.
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- W2356334518 date "2012-01-01" @default.
- W2356334518 modified "2023-09-25" @default.
- W2356334518 title "Fault Detection and Faulty Phase Determination of Transmission Lines Based on Time-Frequency Characteristics of Transient Travelling Waves" @default.
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